/**
 * Copyright 1999-2015 dangdang.com.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * </p>
 */

package com.vip.saturn.job.reg.base;

/**
 * 注册中心.
 * 
 * 
 */
public interface RegistryCenter {

	/**
	 * 初始化注册中心.
	 */
	void init();

	/**
	 * 关闭注册中心.
	 */
	void close();

	/**
	 * 获取注册数据.
	 * 
	 * @param key 键
	 * @return 值
	 */
	String get(String key);

	/**
	 * 获取数据是否存在.
	 * 
	 * @param key 键
	 * @return 数据是否存在
	 */
	boolean isExisted(String key);

	/**
	 * 持久化注册数据.
	 * 
	 * @param key 键
	 * @param value 值
	 */
	void persist(String key, String value);

	/**
	 * 更新注册数据.
	 * 
	 * @param key 键
	 * @param value 值
	 */
	void update(String key, String value);

	/**
	 * 删除注册数据.
	 * 
	 * @param key 键
	 */
	void remove(String key);

	/**
	 * 获取注册中心当前时间.
	 * 
	 * @param key 用于获取时间的键
	 * @return 注册中心当前时间
	 */
	long getRegistryCenterTime(String key);

	/**
	 * 直接获取操作注册中心的原生客户端. 如：Zookeeper或Redis等原生客户端.
	 * 
	 * @return 注册中心的原生客户端
	 */
	Object getRawClient();
}
